<html>
<head>
    <title>JS get MAC</title>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <meta name="generator" content="editplus" />
    <script event="OnObjectReady(objObject,objAsyncContext)" for="foo">
        if(objObject.IPEnabled!=null&&objObject.IPEnabled!="undefined"&&objObject.IPEnabled == true){
            if(objObject.MACAddress!=null&&objObject.MACAddress!="undefined"&&objObject.DNSServerSearchOrder!=null)
                MACAddr=objObject.MACAddress;
            if(objObject.IPEnabled&&objObject.IPAddress(0)!=null&&objObject.IPAddress(0)!="undefined"&&objObject.DNSServerSearchOrder!=null)
                IPAddr=objObject.IPAddress(0);
            if(objObject.DNSHostName!=null&&objObject.DNSHostName!="undefined")
                sDNSName=objObject.DNSHostName;
        }
    </script>
    <script type="text/javascript">
        var MACAddr;
        var IPAddr;
        var DomainAddr;
        var sDNSName;
        function init(){
            var service=locator.ConnectServer();
            service.Security_.ImpersonationLevel=3;
            service.InstancesOfAsync(foo,'Win32_NetworkAdapterConfiguration');
        }
        function getMac(){
            document.getElementById('txtMac').value=unescape(MACAddr);
        }
    </script>
</head>
<body onLoad="init()">
<object id="locator" classid="CLSID:76A64158-CB41-11D1-8B02-00600806D9B6" VIEWASTEXT></object>
<object id="foo" classid="CLSID:75718C9A-F029-11d1-A1AC-00C04FB6C223"></object>
<input type="text" id="txtMac" />
<input type="button" id="btn" value="Mac" onClick="getMac()" />
</body>
</html>